Goodwe ET Series User manual

ET SERIES USER MANUAL
HYBRID INVERTER
Offical website
JIANGSU GOODWE POWER SUPPLY TECHNOLOGY CO.,LTD
No. 90 Zijin Rd., New District, Suzhou, 215011, China
www.goodwe.com
[e-mail]
PV Master App SEMS Portal App SEMS Portal website
www.semsportal.com
LinkedIn
340-00446-01
Ver 1.0
2020-09-24

01 INTRODUCTION
TABLE OF CONTENTS
1.1 Introduction to Operating Modes .................................................................................... 01
1.2 Safety & Warnings ............................................................................................................... 02
1.3 Product Overview ............................................................................................................... 04
03 MANUAL OPERATION
3.1 Wi-Fi Configuration ............................................................................................................. 19
3.2 PV Master App ...................................................................................................................... 20
3.3 CEI Auto-Test Function ....................................................................................................... 20
3.4 Startup/shutdown Procedure ........................................................................................... 20
04 OTHER
4.1 Error Messages ................................................................................................................... 21
4.2 Troubleshooting ................................................................................................................. 23
4.3 Disclaimer ........................................................................................................................... 28
4.4 Technical Parameters ........................................................................................................ 29
4.5 Other Tests ........................................................................................................................... 33
4.6 Quick Checklist To Avoid Dangerous Conditions ........................................................... 33
02 INSTALLATION INSTRUCTIONS
2.1 Unacceptable Installations ............................................................................................... 05
2.2 Packing List ......................................................................................................................... 05
2.3 Mounting ............................................................................................................................. 06
2.3.1 Select Mounting Location ........................................................................................ 06
2.3.2 Mounting .................................................................................................................... 07
2.4 Electrical Wiring Connections .......................................................................................... 09
2.4.1 PV Wiring Connections ............................................................................................. 09
2.4.2 Battery Wiring Connections ..................................................................................... 10
2.4.3 On-Grid & Backup Connections .............................................................................. 11
2.4.4 Smart Meter & CT Connections ............................................................................... 14
2.4.5 BMS Connection ........................................................................................................ 15
2.5 DRED/Remote Shutdown Connections ........................................................................... 15
2.6 Earth Fault Alarm Connections ......................................................................................... 18

Mode I
Energy produced by the PV system is used to optimize
self-consumption needs. Excess energy is used to recharge
the batteries and any additional excess energy is then
exported to the grid.
Mode III
(If backup function is included) When the grid fails, the system
automatically switches to backup mode. In this case, the
backup loads can be supplied by both PV and battery energy.
Mode IV
The battery can be charged from the grid and the charging
time/power can be set to various options in the PV Master
App.
Mode II
When there is no PV, and the battery is sufficient , it
cansupply the load together with grid power.
1.1 Introduction to Operating Modes
Note:
The introduction describes the general operation conditions of an ET system.
The operating mode can be adjusted in the PV Master App including the
system layout. The general operating modes for the ET system are shown
below:
01 INTRODUCTION
The ET series, also called hybrid or bidirectional solar inverters, can be applied to solar systems
using PV, batteries, loads and grid systems for energy management. The energy produced by PV
systems can be used to optimize household loads, the excess energy charges the battery, and
once the battery is fully charged any excess energy at that point is exported to the grid.
The battery discharges to support loads when the available PV power is insufficient to meet
self-consumption requirements. If the battery power is insufficient, the system draws power from
the grid to support any loads.
The ET system typically has the following operating modes based on your configuration and
layout conditions. Note: Backup function is optional for German market
Caution!
Failure to observe any warnings contained in this manual may result in injury.
Danger - high voltage and electric shock!
The components of the product can be recycled.
This side up! This package must always be transported, handled and stored
in such a way that the arrows always point upwards.
Danger - hot surface!
No more than six (6) identical packages are to be stacked on top of each other.
The product shall not be disposed of as household waste.
Fragile - The package/product must be handled carefully and should never
be tipped over or slung.
Refer to the operating instructions.
Keep dry! The package/product must be protected from excessive humidity and
must be stored under cover.
This symbol indicates that you should wait at least 5 minutes after disconnecting
the inverter from the utility grid and from the PV panel before touching any inner
live parts.
CE mark
5min
1.2 Safety & Warnings
The ET series of inverters from Jiangsu GoodWe Power Supply Technology Co., Ltd. (also
called GoodWe) strictly complies with related safety rules for product design and testing.
Please read and follow all of the instructions and cautions appearing on the inverter or in the
User Manual during installation, operation and maintenance, as any improper operation
might cause personal injury or property damage.
Explanation of Symbols
02
01

Safety warnings
Any installation or operations on the inverter must be performed by qualified electricians in
compliance with standards, wiring rules and the requirements of local grid authorities or compa-
nies (such as AS 4777 and AS/NZS 3000 in Australia).
Never insert or remove the AC or DC connections when the inverter is running.
Before making any wiring connections or performing electrical operations on the inverter,
all DC and AC power must be disconnected from the inverter for at least 5 minutes to make
sure that the inverter is totally isolated to avoid electric shock.
The temperature of the inverter surface can exceed 60℃ during operation. Make sure it has
cooled down before touching it and make sure the inverter is out of reach of children.
Do not open the inverter cover or change any components without manufacturer's authori-
zation. Otherwise, the warranty for the inverter will be invalid.
The usage and operation of the inverter must follow the instructions in this User Manual.
Otherwise, the protection design might be impaired and the warranty for the inverter will be
invalid.
Appropriate methods must be adopted to protect the inverter from static electricity
damage. Any damage caused by static electricity is not warranted by the manufacturer.
PV negative (PV-) and battery negative (BAT-) on inverter side are not grounded as the
default design. Connecting either PV- or BAT- to EARTH is strictly forbidden.
Any PV modules used with the inverter must have an IEC61730 class A rating, and the total
open-circuit voltage of the PV string/array must be lower than the maximum rated DC input
voltage of the inverter. Any damage caused by PV overvoltage is not covered by the warranty.
When exposed to sunlight, the PV array generates dangerous high DC voltages.
Please operate the inverter according to these instructions, or danger to life may result.
The inverter, with a built-in RCMU, will prevent the possibility of DC residual currents up to
6mA. Thus, in the system, an external RCD (type A) can be used (≥30mA).
In Australia, the output of the backup side in the switchbox should be labelled "Main Switch
UPS Supply". The output on the normal load side in the switch box should be labelled "Main
Switch Inverter Supply".
1.3 Product Overview
Wi-Fi Reset
Note:
[1] Model GW5K/6K/6.5K/8K/10K-ET is normally equipped
with a DC switch. Model GW5KL/6KL/8KL/10KL is
optionally equipped with a DC switch which has the
certification of AS/NZS AS/NZS 5033:2014/Amdt 2:2018.
[2] Only the GW8KL and GW10KL-ET PV2 inputs have 2 pairs
of PV connectors
[3] Optional function in German market
LED Indicators
Backup Port [3] On-Grid Port
Smart Meter Communication Cable
BMS Communication Cable
Battery Terminals
PV Terminals [2]
DC Switch [1]
Wi-Fi Box
DRED & Remote Shutdown
To Smart Meter
To Battery
HYBIRD LED INDICATORS
INDICATOR
SYSTEM
BACKUP
BATTERY
GRID
ENERGY
COM
Wi-Fi
FAULT
STATUS
ON = System is ready BLINK = System is starting up OFF = System is not operating ON = Backup is ready/power available OFF = Backup is off/on power available ON = Battery is charging BLINK 1 = Battery is discharging BLINK 2 = Battery is low/soc is low OFF = Battery is disconnected/not active ON = The grid is active and connected OFF = The grid is not active ON = Wi-Fi is connected/active BLINK 1 = Wi-Fi is resetting BLINK 4 = Wi-Fi server problem OFF = Wi-Fi is not active ON = A fault has occurred BLINK4 = CT wiring fault OFF = No fault EXPLANATION
SYSTEM BACKUP BATTERY GRID ENERGY COM Wi-Fi FAULT
BLINK = The grid is active but is not
connected
BLINK 1 = Supplying energy to the grid/
zeroing
BLINK 1 = Meter communications are OK,
BMS communications have failed
BLINK 2 = BMS communications are OK,
meter communications have failed
BLINK 2 = Wi-Fi is not connected to the
router
BLINK1 = Overload of backup output/
reduce load
BLINK 2 = Supplying energy to the grid/
selling
OFF = The grid is not connected or the
system is not operating
OFF = BMS and meter communications
have both failed
ON = Consuming energy from the grid/
purchasing
ON = BMS and meter communications
are OK
04
03

2.1 Unacceptable Installations
INSTALLATION INSTRUCTIONS 02
2.2 Packing List
Single PV string cannot connect to multiple inverters
Please avoid the following installations types, which will damage the system or the inverter.
Upon receiving the hybrid inverter, please check if any of the components listed below are missing
or broken.
PV PV
The inverter battery input must not be
connected to incompatible batteries.
The backup side cannot be
connected to the grid.
The on-Grid or backup side cannot
be connected to any AC generator
directly.
On-Grid Battery Backup On-Grid Backup
For the general version, backup cannot connect in parallel.
For advanced applications, please contact our after-sales
department.
Backup Back-Up
Load
On-Grid
Backup
The Inverter does not support
off-grid functions in gridless areas.
One battery bank cannot be
connected to multiple inverters.
Load
One meter cannot be connected to
multiple inverters. Different CTs
cannot connect to the same line cable.
Smart Meter
Battery
Pin
Terminal
PE
Terminal
Expansion
Bolts
AC Cover
Fixed
Screw
Positive PV Plug
or
Positive &
Negative BAT
&or
Negative PV Plug
Inverter
ET SERIES USER MANUAL
HYBRID INVERTER
User Manual Quick Installation
Instructions
Smart Meter
With 3 CT
Wall-Mounted
Bracket
For inverter protection and convenient maintenance, the mounting location for the inverter
should be selected carefully based on the following rules:
No part of the system should not block the switch or breaker from disconnecting the inverter from
DC and AC power.
Rule 1. The inverter should be installed on a solid surface which is suitable for inverter's dimen-
sions and weight.
Rule 2. The inverter should be installed vertically or be on a slope with a maximum value of 15°.
2.3 Mounting
2.3.1 Select Mounting Location
300mm
500mm
200mm 200mm
Upward
Downward
Front
Both sides
---------- 300mm
------ 500mm
------------- 300mm
-------- 200mm
Keep away from sunlight. Keep the inverter dry. Keep the inverter clear of snow. Sun Rain Accumulated snow
300mm
Rule 3. The ambient temperature should be lower than 45°C.
(High ambient temperatures will cause power derating of the inverter.)
Rule 4. The inverter installation should be protected by shelter from direct sunlight or bad weath-
er such as snow, rain, lightning etc.
Rule 5. The inverter should be installed at eye level for convenient maintenance.
Rule 6. The product label on the inverter should be clearly visible after installation.
Rule 7. Leave enough space around the inverter according to the figure below.
Max
15°
Incompatible battery
Generator
bluetooth
Module
Wi-Fi
Module
06
05

110mm 120mm
120mm
A lock is not included in the package
and can be purchased by the user.
Note: The bearing capacity of the wall must be greater than 25kg. Otherwise, the wall may not be able to
prevent the inverter from dropping.
2.3.2 Mounting
The inverter must not be installed near flammable or explosive materials or near
equipment with strong electromagnetism.
The inverter is suitable for mounting on concrete or other non-combustible surfaces only.
Step 1
Step 2
Step 3
Step 4
Please use the mounting bracket as a template to drill 4 holes in the correct positions (e.g.
10mm in diameter and 80mm in depth).
Use the expansion bolts in the accessory box and tightly attach the mounting bracket to
the wall.
The ground cable shall be connected to the ground plate on the grid side.
Carry the inverter by holding the heat sink on two sides and place the inverter on the
mounting bracket.
The inverters can be locked for anti-theft purposes if this is necessary for individual
requirements.
Wall Bracket
Self-Tapping Screws
Expansion Pipe
08
07

Note: There are MC4, QC4.10, or Amphenol plugs in the accessory box. The connection details are
shown below.
Note:
1. Please use the PV plugs and connectors
from the accessory box.
2. The PV cable should be a standard
2.5–4mm2.
Note: There will be a clicking sound if the connectors are inserted
correctly into the PV plugs.
The polarity of the PV strings must not be connected in a reverse manner. Otherwise,
the inverter could be damaged.
For the GW8KL-ET and GW10KL-ET models, use two separate PV plugs if the short-cir-
cuit current of the PV array connected to inverter's PV2 input is greater than 15A.
Make sure that the battery switch is off and that the nominal battery voltage meets ET series specifications before
connecting the battery to the inverter. Make sure the inverter is totally isolated from both PV and AC power.
Please strictly follow the requirements and steps listed below. Using inappropriate wires may cause bad contacts and
high impedances, which are dangerous for the system.
2.4.2 Battery Wiring Connections
Please be careful of any electric shock or chemical hazards. For batteries without a built-in DC
breaker, make sure that an external DC breaker (≥40A) connected.
Make sure the battery is under normal working condition （such as battery voltage and BMS
setting etc.）when the inverter and battery is to be used. If you need to use the hybrid inverter as
a Grid-tied inverter, please contact GoodWe after-sales.
Before connecting PV panels/strings to the inverter, please make sure all requirements listed
below are followed:
• The total short-circuit current of a PV string must not exceed the inverter's max DC current. (For
models GW8KL-ET and GW10KL-ET, PV2 has 2 pairs of PV connectors which can accept 2PV
strings with a total short-circuit current of no more than 22A)
• The minimum isolation resistance to ground of the PV string must exceed 19.33kΩ in case of any
shock hazard.
• The PV string must not be connected to the earth/grounding conductor.
• Use the right PV plugs in the accessory box. (BAT plugs are similar to PV plugs. Please check
before using them.)
Step 1
Step 3
2.4 Electrical Wiring Connection
2.4.1 PV Wiring Connection
Prepare the PV cables and PV plugs.
Screw the cap on and plug it into the inverter side.
2.5-4mm27mm
2.5-4mm27mm
Step 2
Connect the PV cable to the PV connectors.
Note:
1. The PV cable must be tightly crimped onto
the connectors.
2. For Amphenol connectors, the limit buckle
cannot be pressed.
3. There will be a clicking sound if the connec-
tors are inserted correctly into the PV plugs.
Use the correct BAT plugs from the accessory box.
The maximum battery current is 25A. Please use the tin-plated cables for which the cross section
ranges from 4 to 6mm² (AWG 10). The battery cable requirements are shown in Figure 2.4.2-1.
C
A
B
Figure 2.4.2-1
Connection process for battery wiring
Step 1
Step 3
Open the spring using a screwdriver.
Insert the cable gland into the sleeve (C).
Tighten the cable gland to 2 Nm torque (D).
Use a suitable and calibrated torque
wrench, size 15. Use an open-jaw wrench,
size 16, to hold the connector in place.
D
C
Size 15
2 Nm
Step 2
Step 4
Carefully insert the stripped wire with
twisted litz wires all the way into (A). The
litz wire ends must be visible in the spring.
Close the spring. Make sure that the spring
is snapped into (B).
Insert two BAT
connectors into the
inverter BAT input.
There will be a
clicking sound if the
connectors are
inserted correctly.
B
click!
A
MC4 /QC4.10 Series AMPHENOL Series
Grade
A
B
C
Description
Outside diameter of insulation
Conductor core section
Conductor core length
Value
5.5-8.0 mm
4-6 mm2
15 mm
MC
MC
10
09

Step 4
Note:
1. The neutral cable shall be blue, the line cable shall be black or brown (preferred), and the protective
earth cable shall be yellow-green.
2. For AC cables, the PE cable shall be longer than the N&L cables. This provides protection in case the AC
cable slips or is removed, the ensuring that the earth conductor will be the last cable to take the strain.
Make sure the inverter is totally isolated from any DC or AC power before connecting
the AC cable.
2.4.3 On-Grid & Backup Connection
An external AC breaker is needed for the on-grid connection for isolation from the grid when
necessary.
Note: Backup function is optional for only German market, even though the hardware connector is always
there.
The requirements for the on-grid AC breaker are shown below.
Requirement of AC cable connected to On-Grid and Back-Up side.
1. Use separate AC breakers for individual
inverters.
2. On the AC side, an individual breaker
should be connected between the
inverter and grid but before any loads.
AC Breaker
AC Breaker
AC Breaker
Grid
AC breaker
Loads
Prepare the terminals and AC cables according to the correct table.
Step 1
ABC
D
Use a screwing
torque of
2.0‒2.5Nm
Special adjustable settings
The inverter has a field where the user can set functions, such as trip points, trip time, time of
reconnection, active and invalid of QU curve, and PU curve. These functions can be adjusted by
using special software. If interested, please contact the after-sales department.
Place the AC cable through the terminal cover
as shown in the figure.
Note: Please use the terminals in the accessory
box.
Press the connectors tightly on the cable conductor core.
Note: Make sure the cable jacket is not locked within the connector.
1. Connect the assembled AC cables to AC terminals with a fastening torque of approxi-
mately 2.0-2.5 Nm.
Note: (If the inverter has backup function) Connect the backup terminals before connecting
the on-grid terminals. Make sure they are not connected to the wrong side.
2. Lock the cover and screw on the cap.
Step 2
Step 3
Cables
Screw Cap
AC Sheet Cover
The Insulator
Single Hole
Seal Ring
Inverter model
GW5K/GW5KL-ET
GW6.5K/GW6KL-ET
GW8K/GW8KL-ET
GW10K/GW10KL-ET
AC breaker specifications
25A/400V (e.g. DZ47-60 C25)
25A/400V (e.g. DZ47-60 C25)
32A/400V (e.g. DZ47-60 C32)
32A/400V (e.g. DZ47-60 C32)
Grade
A
B
C
D
Description
Outside diameter
Separated wire length
Conductor wire length
Conductor core section
Value
13-18 mm
20-25 mm
7-9 mm
4-6 mm2
Grid
Note: The absence of an AC breaker on the backup side will lead to inverter damage if an electrical short
circuit occurs on the backup side.
12
11

OFF
ON
2.4.4 Smart Meter & CT Connections
Make sure the AC cable is totally isolated from AC power before connecting the Smart
Meter and CT.
Declarations for the backup function
The backup outputs of the ET hybrid inverters have overload capability.
For details please refer to the technical parameters in the ET series inverter section (Page 29).
The inverter has self-protection derating at high ambient temperatures.
The statement below lays out the general policies governing the series EH, EM, ES, ET, BH, BT and
SBP energy storage inverters.
1. For hybrid inverters (e.g. Series EH, EM, ES, and ET), a standard PV installation typically consists
connecting the inverter to both panels and batteries. When the system is not connected to the
batteries, the manufacturer strongly advises that the backup function not be used. The manu-
facturer will not honour the standard warranty and will not be liable for any consequences
arising from users not following this instruction.
2. Under normal circumstances, the backup switching time is less than 10ms (e.g. the minimal
condition to be considered as a UPS-level switching). However, some external factors may cause
the system to fail in backup mode. Due to this, we recommend that users to be aware of these
conditions and follow the instructions as described below:
• Do not connect loads which are dependent on a stable energy supply for reliable operation.
• Do not connect the loads which may, in total, exceed the maximum backup capacity.
• Try to avoid those loads which may create very high start-up current surges such as inverters,
air conditioners, high-power pumps etc.
• Due to the battery condition itself, the battery current might be limited by factors including but
not limited to temperature and weather etc.
Acceptable loads are shown below:
• Inductive Loads: 1.5 P non-frequency conversion air conditioners can be connected to the
backup side. Two or more non-frequency conversion air conditioners connected to backup side
may cause the back-up mode to be unstable.
• Capacitive Loads: A total power ≤ 0.6 × nominal power of the model. (Any load with high startup
current is not acceptable.)
• For complicated applications, please contact the GoodWe Solar Academy.
Declarations for backup overload protection
The inverter will restart itself if overload protection is triggered. The preparation time for restarting
will be increasingly long (one hour at most) if an overload recurs. Take the following steps to imme-
diately restart the inverter.
Decrease the backup load power to within the maximum limitation.
On The PV Master App → Advanced Settings → Click "Reset Backup Overload History".
A Smart Meter with the CT in product box is compulsory for ET system installation and is used to
detect the grid voltages and current directions and also is used to provide the operating
condition of the ET inverter via RS485 communications.
Note:
For convenient maintenance, please install a SP 3T switch on both the backup and on-grid sides. Then it is
adjustable to support load by backup or by grid or default settings.
Note:
1. The Smart Meter with CT is already configured ; please do not change any settings on the Smart
Meter.
2. One Smart Meter can be used with only one ET inverter.
3. Three CTs must be used for one Smart Meter and must be connected on the same phase with the
Smart Meter power cable.
Note:
1. Please use the Smart Meter with the 3 CTs contained in the product box.
2. The CT cable is 3m long as a default and can be extended to maximum of 5m.
3. The Smart Meter communication cable (RJ45) is attached on the inverter ("To Smart Meter" cable),
and be extended to a maximum length of 100m, and must use a standard RJ45 cable and plug, as
shown below:
1. The backup load is supplied from backup side.
2. The backup load is isolated.
3. The backup load is supplied from grid side.
Smart Meter & CT connection diagram
Backup
4Pole 3Throw
1
2
3
On-Grid
Grid
Load
PE
N
L3
L2
L1
Grid
Load
CT A connect to L1
CT B connect to L2
CT C connect to L3
CT C
CT B
CT A
To Smart Meter
Power Meter
Grid side
Smart Meter
14
13

NO.
Function
1
DRM1/5
2
DRM2/6
3
DRM3/7
4
DRM4/8
5
REFGEN
6
COM / DRMO
Unscrew this plate from the inverter.
Note: DRED should be connected to
the "DRED Port" as shown in the figure.
Step 1
Step 2
1. Pull out the 6-pin terminal and disconnect the
resistor located on this terminal.
2. Pull the resistor out and leave the 6-pin
terminal for the next step.
Note: The 6-pin terminal in the inverter has the
same function as DRED. Please leave it in the
inverter if no external device is connected.
Step 4
Detailed pin functions of each port on the ET
BMS：CAN communication is configured by default. If 485 communication is used, please contact
the after-sales department to replace this with the correct communication line.
2.4.5 BMS Connection
BMS is used to communicate with the connected compatible lithium
battery.
There is a 3m communication line marked "To Battery" on the inverter
Connection steps
1. Confirm that the battery and inverter power lines are connected (refer to 2.4.2 Battery Wiring Connections)
2. Connect the BMS communication line of the inverter to the communication interface of the lithium battery
3. Select the corresponding battery through the APP (please follow the user manual of the PV master app)
2.5 DRED (Remote shutdown) Connection
DRED (Demand response enabling device) is used for Australian and New Zealand installations (and is also used
to provide the remote shutdown function in European countries) in compliance with Australian and New
Zealand safety requirements (or for European countries). The inverter integrates control logic and provides an
interface for DRED. The DRED is not provided by the inverter manufacturer.
Detailed connection of DRED (REMOTE SHUTDOWN) is shown below:
POWER
ENERGY
COM
Steps 1-3 For DRED
1. Put the cable through the plate.
2. Wiring from the No. 5 and 6 holes.
Connect the DRED terminal to the correct position on the inverter.
Step 3-2 For Remote Shutdown
1. Place the DRED cable through the plate.
2. Connect the DRED cable to the 6-pin terminal.
The function of each connection position is
shown below.
2.6 Earth Fault Alarm Connection
ET series inverters comply with IEC 62109-2 13.9. The fault indicator LED on the inverter cover will
light up and the system will email the fault information to customer.
123456
Screw Nut
Insulator Screw Cap
RS485
Communication Board
CableSingle Hole
Seal Ring
123456
Screw Nut
Insulator Screw Cap
RS485
Communication Board
CableSingle Hole
Seal Ring
Position
1
2
3
4
5
6
7
8
Colour
Orange & white
Orange
Green & white
Blue
Blue & white
Green
Brown & white
Brown
EMS
485_A
485_B
485_A
NC
NC
485_B
NC
NC
BMS Function
485_A2
NC
485_B2
CAN_H
CAN_L
NC
NC
NC
Smart Meter Function
NC
NC
485_B1
NC
NC
485_A1
485_B1
485_A1
Smart Meter LED indications
STATUS
POWER
ENERGY
COM
OFF
Not working
/
ON
Working
Importing
Blinks one time when data are transferred to the inverter
Blinking
/
Exporting
NO.
Function
5
REFGEN
6
COM / DRMO
16
15